NGC 6755 and 6756 (Gary Imm)

Celestial hemisphere: Northern · Constellation: Aquila (Aql) · Contains: LDN 635 · LDN 636 · LDN 639 · NGC 6755 · NGC 6756 · PK039-02.2 · Sh2-74

Powered byPixInsight

NGC 6755 and 6756

Powered byPixInsight

NGC 6755 and 6756

This image captures a pair of open clusters located 5000 light years away in the constellation of Aquila. The clusters lie in the dust clouds of the Great Rift of our galaxy. These clouds greatly dim the brightness of these clusters by at least 3 magnitudes. Also visible are some interesting dark dust lanes that flow through the image. I was tempted to crop the image to highlight the clusters, but in the end I felt that the surrounding sky was too interesting to cut out.

The full resolution view is necessary to see the clusters in detail. NGC 6755 is to the left and NGC 6756 is to the right. Some believe that this pair may be the 2nd binary open star cluster identified in the Milky Way (the first being NGC 869 and 884, the Double Cluster). A binary open cluster is two open clusters which were birthed from the same molecular cloud. But recent studies of the separation and age of these 2 clusters have determined that they likely had different origins.

NGC 6755 has 150 stars and is about 25 light years in diameter, while NGC 6756 has 40 stars and is only 5 light years in diameter. Both clusters are silhouetted against starry backgrounds but there is enough difference in magnitude with the background that the clusters are fairly easily identified. The smaller cluster is easier to spot because it is more dense.

The refractors!
Cloudy Nights
ZWO ASI1600MM/QHY163M
Open Star Clusters
Takahashi Refractors

Open Clusters
Secret Deep Catalog (Complete)

Please note: The following tables are updated every 24 hours.

Distribution of astrophotographers

This table shows the number of distinct astrophotographers who have been assigned and IOTD/TP award compared to the total number of images awarded.
	Distinct awarded users	Total awarded images
Image of the day
Top picks
Top pick nominations

Distribution of subject types

This table shows the distribution of awards per subject type, compared to the popularity of images of that subject type.
	Image of the day	Top pick	Top pick nominations	Total submitted
Deep sky
Solar system
Extremely wide field
Star trails
Northern lights
Noctilucent clouds
Landscape

Distribution of data sources

This table shows the distribution of awards per data source, compared to the popularity of images acquired from that data source.
	Image of the day	Top pick	Top pick nominations	Total submitted
Backyard
Traveller
Own remote observatory
Amateur hosting facility
Public amaeteur data
Professional, scientific grade data
Mix of multiple sources
Other
Unknown

The “AstroBin Image of the Day and Top Picks”, or IOTD/TP, is a long-running system to promote beautiful, interesting, peculiar, or otherwise amazing astrophotographs, with a focus on technical excellence. Learn more.

Submitted The date and time when you submitted this image for IOTD/TP consideration.	...
Views by Submitters (available since September 19th, 2023) Every image is assigned to 50% of available Submitters. In the event that at least 80% of them don't view the image before its time in the IOTD/TP process expires, it's assigned to the other 50% of Submitters and the process begins anew.
Promotions by Submitters When 3 distinct Submitters promote the image, it moves on to the next stage of the process: evaluation for Top Pick status. This requirement, in addition to anonymization of images and distribution to only a subset of them, prevents biases and ensures that the best images are selected.
Promotions by Reviewers When 3 distinct Reviewers promote the image, it moves on to the next stage of the process: evaluation for IOTD status.
Early dismissal Staff members have a lot of images to inspect on a daily basis, and they can dismiss images if they believe they don't meet the requirements for IOTD/TP selection. If an image is dismissed 5 times, it's removed from the process. This streamlines the process and ensures that any bias present in promotions could be overruled by other staff members.

Status	Advanced success
Started	...
Astrometry.net job	2859475
PixInsight job	T0QCPONLKKAP3LW01VSVN84L7ES5KVBB
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	19h07m57s.26
RA (top/left)	19h08m47s.62
RA (top/right)	19h12m59s.13
RA (bottom/right)	19h07m06s.19
RA (bottom/left)	19h02m55s.60

Dec (center)	+04°30′54″.8
Dec (top/left)	+03°08′47″.7
Dec (top/right)	+05°05′54″.3
Dec (bottom/right)	+05°53′00″.2
Dec (bottom/left)	+03°55′57″.7

Image Index:

Contribution Index (beta):

NGC 6755 and 6756

NGC 6755 and 6756

Equipment

Acquisition details

Description

Comments

Sky plot

Histogram

In these public groups

In these collections

		...
You have no new notifications.

Image Index:

Contribution Index (beta):

NGC 6755 and 6756

NGC 6755 and 6756

Equipment

Acquisition details

Description

Comments

Sky plot

Histogram

In these public groups

In these collections

Notifications

AstroBin is in READ ONLY mode

Sorry :-(

Sorry :-(

Sorry :-(

Are you really sure?

Warning!

Warning!

Are you sure?

Report abuse

Slideshow settings

IOTD/TP stats (last [x] days)

Distribution of astrophotographers

Distribution of subject types

Distribution of data sources

Sorry

Sorry

Share

Upload new revision

Upload uncompressed source (XISF/FITS/PSD/TIFF)

Delete image and all its revisions?

Delete original image?

Delete all other versions?

Delete all revisions?

IOTD/TP stats

The following people like this image

The following people bookmarked this image

Warning

Flag malfunctioning thumbnails

Contains

Remove yourself as a collaborator

Plate-solving information